Observations of an interplanetary switch-on shock driven by a magnetic cloud
文献类型：期刊论文
| 作者 | Feng, H. Q. ; Lin, C. C. ; Chao, J. K. ; Wu, D. J. ; Lyu, L. H. ; Lee, L. C. |
| 刊名 | Geophysical Research Letters
 |
| 出版日期 | 2009 |
| 卷号 | 36页码:L07106 |
| 关键词 | rankine-hugoniot problem quasi-parallel bow shock cylinder wind flow |
| ISSN号 | 0094-8276 |
| 通讯作者 | 北京8701信箱 |
| 英文摘要 | A possible interplanetary switch-on shock event prior to a trailing magnetic cloud was observed on August 1, 2002 at 1 AU. We fit the data with the Rankine-Hugoniot (R-H) relations based on both oblique and switch-on shock models. It is found that both models are consistent with the observed data, and the best fit solutions of the two models are close to one another. For the oblique shock model, the best fit upstream shock normal angle, theta(BN1) (= cos(-1) (B-t1/B-t1)), is as small as 5.55 degrees. The shock has the following characteristics: (1) plasma density, plasma temperature, and the magnetic field strength all increase across the shock, (2) protons are thermalized very efficiently across the shock, but it is not the case for electrons, (3) the fast-mode Mach number is greater than unity in the preshock region and less than unity in the postshock region, and (4) from the oblique shock model we find that the normal Alfven Mach number is very close to unity in the postshock region, while from the switch-on shock model we obtain a solution of unity normal Alfven Mach number. Our results clearly demonstrate the MHD character of a fast shock propagating along the ambient magnetic field. |
| 收录类别 | SCI |
| 原文出处 | http://www.agu.org/pubs/crossref/2009/2009GL037354.shtml |
| 语种 | 英语 |
| 源URL | [http://ir.cssar.ac.cn/handle/122/1702]  |
| 专题 | 国家空间科学中心_其他部室 |
| 推荐引用方式 GB/T 7714 | Feng, H. Q.,Lin, C. C.,Chao, J. K.,et al. Observations of an interplanetary switch-on shock driven by a magnetic cloud[J]. Geophysical Research Letters,2009,36:L07106. |
| APA | Feng, H. Q.,Lin, C. C.,Chao, J. K.,Wu, D. J.,Lyu, L. H.,&Lee, L. C..(2009).Observations of an interplanetary switch-on shock driven by a magnetic cloud.Geophysical Research Letters,36,L07106. |
| MLA | Feng, H. Q.,et al."Observations of an interplanetary switch-on shock driven by a magnetic cloud".Geophysical Research Letters 36(2009):L07106. |
入库方式： OAI收割
来源：国家空间科学中心
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